Lock



Jan. 24, 1928. 1,657,039

J. V. SCHAFER LOCK Filed M 7, 1927 Iva/6 157 Patented Jan. 24, 1928.

UNITED STATES PATENT oFFica JOHN v. scnarrna, or rlsonsongiuronienn, Assrenea TO nanny A. nouenasior r BR0NS0N,'1VIICHIGAN.

LOCK.

Application and March 7, 192?. Serial No.173,386.

lVIyinvention'relates to locking structures of thefolass'jemploying tumbler barrels, tumblers in the barrels, and guards surrounding fthe' tumbler barrels and with whichthetumblers are engaged to lock the tumblersand to preventthe tumbler barrels from turning, it they are mounted to turn,

andttro'm which the tumblers are separated to permit the tumbler barrels to be turned.

My invention-has for its object theprovision'" of" improved means for positively throwing thetumblers into position to en gage-the guards when the keys that are aceept'able by the tumbler barrels are withdrawn, such keys serving to move the tumblers 'oiitfofengagementwith said guards when the' key's are inserted. The means for positively "throwi the tumblers into engagement with the guards when the keys are withdrawn reside in springs. These springs are desirably coiled and have their axes arranged along the axes ot'the' barrels. Each tional View otthe' preterred embodiment of a the invention online 1.- 1.ot= Fig. :2, thekey beingabsent; Fig. 2 is'a longitudinal sectional viewon line 2.-2 of Fig. 1, a key being shown indotted lines within thebarrel; isa cross seetionalview similarto Figul with the key inserted; 'Fig. 4. is a longitudinal sectional view taken at right angles to the. direction in which F1g.'2 1s taken, the key being shown in dotted lines; and Figs: 5,6 and 'Tfare cross sectional views of modifications. y

The tumbler barrel 1 is preferably mounted to turn within the guard 2, the tumbler barrel having a front flange 3 which prevents rearward axial movement thereof and having a nut 4c screwed upon its rear end that serves to prevent forward axial move ment of the tumbler barrel, the guard 2 be ing interposed between the flange 3 and the nut 4. The tumbler barrel" may be connected by any suitable means desired, such as the actuating member of an electrical switcln as is well understood. The guard 2 hat embraces the tumbler'barrelis termed with opposite recesses 5 that are'disposed in the Zone in which the varioustumblers. 6,7,

These tumblers extend transversely ofthe axis of the tumbler barrel and when this tumbler barrel is properly positioned, the operatingkey 10 being absent, one end of each tumbler enters one 8 and 9 are disposed.

or the other of the recesses 5. When the key is inserted, the tumblers are withdrawn 1HtOl3l1B- barrel and out of said recesses,

whereupon the tumbler turned. 1

barrel may be The tumblers are arranged in pairs, the adjacent tumblers 6 and 7 constituting one pair and the adjacent tumblers Sand 9 constituting the other pair. The tumblers ar desirably" spaced apart by being passed through slots that constitute radial continuations of the bore of'the tumbler barrel. A coiledspring 11 is provided for each pair of tumblers to'project the same in the re cesses 5 when the key is withdrawn. The

axes o1: these springs desirably extend along .the axis otthe tumbler barrel. One pair of tumblers 6 and 7 will bespecifioally consideredrthe. turtherez zplanation of it about to be givenapplying to the otherpair of tumblers Sand 9.: Ineaoh form of the invention except that shown in Fig. '7, the spring 11. has its end portions 11", 1 1 .bent toexa tend lengthwise: of the tumblers, one spring end being received/in a recess termed in the side of one tumbler and the other spring end beingreceived in a recesstormed in the sideot the other U11T1bll1,l3l18 extreme ends end of the corresponding recess that receives it. The spring ISulWEIYS under tension, one end. of thespring serving. to press I uponone tumbler of the correspondingpair in one direction and the other'end of the I spring serving to press upon the other tumbler of this pair in the opposite direction. When the key is inserted the tension of the spring is-increased. When the key is with drawn, one spring end serves to press one end of one tumbler into one holding recess 5, and the other spring end serves to press the opposite end ot the adjacent tumbler into the other recess 5.

In the structures of or the spring portions l1.,:11 engaging one 1 III Figs. 1 to (j, lugs 12 upon the tumblers are adapted to engage the shoulders 13 upon the tumbler barrel to limit the extent to winch the spring may thrust the tumblers. In the structure shown in Fig. 7 the spring por-- tions 11, 11, the lugs 12 and shoulders 13 are omitted and the tumbler barrel is provided with wing portions 14- which over hang the slot 15 in the tumbler barrel that receives the spring, these wing portions being spaced apart a distance less than the diameter of the coils of the spring to prevent the springs from being displaced by outward movement.

Changes may be made without departing from the invention.

Having thus described my invention, I claim:

1. In a lock, the combination with a key receiving tumbler barrel; a guard enibraeing said tumbler barrel; two adjacent tumblers carried by the tumbler barrel and movable oppositely into and out of engagement with said guard and operable by a key to be with drawn from engagement with said guard; and a single coiled spring carried by the tumbler barrel which has a slot receiving the spring and a wing portion at the slot for maintaining the spring in assembly with the barrel, said spring having its ends continued, one spring end being in engagement with one tumbler and the other in engagement with the other tumbler, these spring ends pressing oppositely upon said tumblers and one spring end serving, when the key is withdrawn, to press one tumbler in one direction into engagement with the guard, and the other spring end serving to press upon the other tumbler in an opposite direction also into engagement with the guard In a lock, the combination with a key receiving tumbler barrel; a guard embracing said tumbler barrel; two substantially parallel tumblers carried by the tumbler barrel and movable oppositely into and out oi engagement with said guard and operable by a key to be withdrawn from engagement with said guard; and a single coiled spring carried by the tumbler barrel and whose axis extends along the exis of the tumbler barrel which has a slot receiving the spring and a wing portion at the slot for maintaining the spring in assembly with the barrel, said spring having its ends continued, one spring end being in engagement with one tumbler and the other in engagement with the other tumbler, these spring ends pressing oppositely upon said tumblers and one spring end serving, when the key is witl'uilrawn, to press one tumbler in one direction into engagement with the guard, and the other spring end serving to press upon the other tumbler in an opposite direction also into engagement with the guard.

:3. In a lock, the combination with a key receiving tumbler barrel; a guard embracing said tumbler barrel; two substantially parallel tumblers carried by the tumbler barrel and movable oppositely into and out of engagement with said guard and operable by a kev to be withdrawn from engagement with said guard; and a single coiled spring carried by the tumbler barrel which has a slot receiving the spring and a wing portion at the slot for maintaining the spring in assembly with the barrel, said spring having its ends continued, one spring end being in engagement with one tumbler and the other in engagement with the other tumbler, these spring ends pressing oppositely upon said tumblers and one spring end serving, when the key is withdrawn, to press one tumbler in one direction into engagement with the guard, and the other spring end serving to press upon the other tumbler in an opposite direction also into engagement with the guard.

it. In a lock, the combination with a key receiving tumbler barrel; a guard embracing said tumbler barrel; two tumblers carried by the tmnbler barrel and movable oppositely into and out of engagement with said guard and operable by a key to be withdrawn from engagement with said guard; and a single coiled spring carried by the tumbler barrel which has a slot receiving the spring and a wing portion at the slot for maintaining the spring in assembly with the barrel. said spring having its ends continued, one spring end being in engagement with one tumbler and the other in engagement with the other tumbler, these spring ends pressing oppositely upon said tumblers and one spring end serving, when the key is withdrawn, to press one tumbler in one direetion into engagementwith the guard, and the other spring end serving to press upon the other tumbler in an opposite direction also into engagement with the guard.

In witness whereof, I hereunto subscribe my name.

JOHN V. SCHAFER. 

